Etienne Pointecouteau

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We investigate the effect of dust on the scaling properties of galaxy clusters based on hydrodynamic N-body simulations of structure formation. We have simulated five dust models plus a radiative cooling and adiabatic models using the same initial conditions for all runs. The numerical implementation of dust was based on the analytical computations of(More)
We investigate the regularity of cluster pressure profiles with REXCESS, a representative sample of 33 local (z < 0.2) clusters drawn from the REFLEX catalogue and observed with XMM-Newton. The sample spans a mass range of 10 14 M < M 500 < 10 15 M , where M 500 is the mass corresponding to a density contrast of 500. We derive an average profile from(More)
We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400  deg^{2} patch of sky centered on RA 0 h, Dec. -57.5°. The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven(More)
We present the integrated mass profiles for a sample of ten nearby (z 0.15), relaxed galaxy clusters, covering a temperature range of [2 − 9] keV, observed with XMM-Newton. The mass profiles were derived from the observed gas density and temperature profiles under the hypothesis of spherical symmetry and hydrostatic equilibrium. All ten mass profiles are(More)
Using a sample of ten nearby (z ∼ < 0.15), relaxed galaxy clusters in the temperature range [2 − 9] keV, we have investigated the scaling relation between the mass at various density contrasts (δ = 2500, 1000, 500, 200) and the cluster temperature. The masses are derived from NFW-type model fits to mass profiles, obtained under the hydrostatic assumption(More)
We present an XMM-Newton mosaic observation of the hot (kT ∼ 6.5 keV) and nearby (z = 0.0881) relaxed cluster of galaxies A478. We derive precise gas density, gas temperature, gas mass and total mass profiles up to 12 ′ (about half of the virial radius R 200). The gas density profile is highly peaked towards the center and the surface brightness profile is(More)
We present in this letter a high resolution (22 " FWHM) extended map at 2.1mm of the Sunyaev-Zel'dovich effect toward the most luminous X-ray cluster, RXJ1347-1145. These observations have been performed with the DIABOLO photometer working at the focus of the 30m IRAM radiotelescope. We have derived a projected gas mass of (1.1 ± 0.1) × 10 14 h −5/2 50 M ⊙(More)
We have mapped the Sunyaev-Zel'dovich decrement (hereafter SZ) in the direction of the most luminous X-ray cluster known to date, RXJ1347-1145, at z = 0.451. This has been achieved with an angular resolution of about 23 " using the Diabolo photometer running on the IRAM 30 meter radio telescope. We present here a map of the cluster central region at 2.1mm.(More)
We present a study of the structural and scaling properties of the gas distributions in the intracluster medium (ICM) of 31 nearby (z < 0.2) clusters observed with XMM-Newton, which together comprise the Representative XMM-Newton Cluster Structure Survey (REXCESS). In contrast to previous studies, this sample is unbiased with respect to X-ray surface(More)